SIK_circuit02_potentiometer by SparkFun SIK Examples

Hardware connections:

Potentiometer:

Potentiometers have three pins. When we're using it as a voltage divider, we connect the outside pins to power and ground. The middle pin will be the signal (a voltage which varies from 0 Volts to 5 Volts depending on the position of the knob).

• Connect the middle pin to ANALOG IN pin 0 on the Arduino.
• Connect one of the outside pins to 5V.
• Connect the other outside pin to GND.

(TIP: if once your program is running, the knob feels "backwards", you can swap the 5V and GND pins to reverse the direction.)

LED:

Most Arduinos already have an LED and resistor connected to pin 13, so you may not need any additional circuitry.

But if you'd like to connect a second LED to pin 13, or use a different pin, follow these steps:

• Connect the positive side of your LED (longer leg) to Arduino digital pin 13 (or another digital pin, but don't forget to change the code to match).
• Connect the negative side of your LED (shorter leg) to a 330 Ohm resistor (orange-orange-brown).
• Connect the other side of the resistor to ground.

Wiring Diagram